Sumatra PDF with simple and intuitive user interface is light weight  PDF Reader offers all the basic features for PDF viewing, starts very fast. Sumatra PDF 1.9 got support for CHM documents, touch gestures on Windows 7. Portable version is also available which you can run from the USB drive.

CHM file opened in Sumatra PDF 1.9

What this means is you can open and view Compiled HTML help files in Sumatra PDF Reader and if you’re on touch screen using gestures you can navigate through the pages in PDF file.

What’s new in Sumatra PDF 1.9

  • support for CHM documents
  • support touch gestures, available on Windows 7 or later. Contributed by Robert Prouse
  • open linked audio and video files in an external media player
  • improved support for PDF transparency groups

Sumatra PDF works on Windows XP/Vista/7.

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